1. Ujian atletik kelas 6 dgn nilai 8,9,7,6,5,7,8,5,6,9,9,8,8,5,9,6,7,7,8,8,9,5,5,6,7 a. Banyak murid yg ikut ujian ...... b. Mean nilai ujian .......... c
Matematika
samuel05
Pertanyaan
1. Ujian atletik kelas 6 dgn nilai 8,9,7,6,5,7,8,5,6,9,9,8,8,5,9,6,7,7,8,8,9,5,5,6,7 a. Banyak murid yg ikut ujian ...... b. Mean nilai ujian .......... c. Median ......... 2. Rata2 nilai 5 ulangan pertama = 7,2 nilai ulangan ke 6 = 80 Berapa rata2 nilai terbaru ? 3. Rata2 nilai 5 ulangan adalah 6,8 Rata2 nilai 6 ulangan = 7,0 maka nilai ulangan ke 6
1 Jawaban
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1. Jawaban yaficanceroyddmf
1. a. nilai ujian atletik = 8,9,7,6,5,7,8,5,6,9,9,8,8,5,9,6,7,7,8,8,9,5,5,6,7
jumlah murid = 25
b. mean (rata -rata)
8+9+7+6+5+7+8+5+6+9+9+8+8+5+9+6+7+7+8+8+9+5+5+6+7 = 177
mean= jumlah nilai/jumlah murid= 177/25 = 7,08
c. median (nilai tengah)
5,5,5,5,5,6,6,6,6,7,7,7,7,7,8,8,8,8,8,8,9,9,9,9,9
median = 7
2. nilai rata-rata 5 ulangan = 7,2
total nilai = 7,2 x 5 = 36
total nilai baru = 36 + 8,0 = 44
rata rata baru = 44/6 = 7,3
3. rata rata 5 ulangan = 6,8
total nilai = 6,8 x 5 = 34
total nilai baru = 7,0 x (5+1) = 42
nilai ulangan ke 6 = 42 - 34 = 8